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2006 F150 FX4 4WD electronic shift doesn't work

Went to use my 4WD the other day and turned the switch to 4H and no light on the dash. Switched to 4L and same thing. 4WD is not engaging. Checked fuses and wiring at transfer case solenoid..all ok. Last time 4WD was used was before dealership replaced vacuum hose which runs behind engine and attaches to intake manifold due to safety recall. Was wondering if there is a connection back there for the 4WD wiring harness which they may have diconnected. Thanks in advance for any help. Really sucks driving in the snow in 2H.........

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Yes you do have a wiire that runs back that way. Mine pops off when 4xing all the time. But that is because I a rough on it and broke the snap. It is on the drivers side near the top of the transfer case

Posted on Feb 07, 2009

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Wont shift into 4wd automatically or manually


I would say the shift actuator my have gone bad. You should check all your fuses for the four wheel drive system with a test light or voltmeter. If their all good see if you can get your hands on a scan tool to check for a code. A four wheel drive problem may not illuminate the check engine light but the computer may still store a code.

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1998 ford explorer auto, 4h,4l. stuck in 4l


Hello, Try keeping your foot on the brake pedal. Then shift the gearshift to neutral and then turn the 4x4 knob to the position you wish.

If this does not work, verify your rear brake lights are working. Then look under the dash at the top of the brake pedal lever and try to position the switch so that it works.

Then go back to my opening statement.

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HOW TO SHIFT TO 4 WHEEL DRIVE


Hi - Here is instruction how to do.

From N to 4H

Stop the vehicle completely, place the

transmission in "N" (Neutral) and depress

the brake pedal and the clutch pedal fully

(if equipped), then push in and turn the

switch to shift into "4H".

From 4H to 4H LOCK

You can operate the transfer switch either

when the vehicle is stopped or while the

vehicle is moving.

Position the front wheels straight ahead

and turn the switch to shift into "4H LOCK".

If the vehicle is moving, we recommend

that the speed be less than 100 km/h (60

mph) during this operation.

NOTE:

• When shifting between the transfer

switch position and the transfer gear

position is unmatched, all 4WD indicators

will blink and the buzzer will sound.

• If it is difficult to shift between "4H" and

"4H LOCK" while the vehicle is moving,

try accelerating and decelerating your

vehicle several times after turning the

transfer switch. Be sure to wait until traffic

conditions allow you to accelerate and

decelerate safety before using this procedure.

From 4H LOCK to 4L LOCK

Stop the vehicle completely, place the

transmission in "N" (Neutral) and depress

the brake pedal and the clutch pedal fully

(if equipped), then push in and turn the

switch to shift into "4L LOCK".

From 4L LOCK to 4H LOCK

Stop the vehicle completely, place the

transmission in "N" (Neutral) and depress

the brake pedal and the clutch pedal fully

(if equipped), then push in and turn the

switch to shift into "4H LOCK".

From 4H LOCK to 4H

You can operate the transfer switch either

when the vehicle is stopped or while the

vehicle is moving.

Position the front wheels straight ahead

and turn the switch to shift into "4H". If the

vehicle is moving, we recommend that the

speed be less than 100 km/h (60 mph) during

this operation.

NOTE:

• When shifting between the transfer

switch position and the transfer gear

position is unmatched, all 4WD indicators

will blink and the buzzer will sound.

• If it is difficult to shift between "4H" and

"4H LOCK" while the vehicle is moving,

try accelerating and decelerating your

vehicle several times after turning the

transfer switch. Be sure to wait until traffic

conditions allow you to accelerate and

decelerate safety before using this procedure.

From 4H to N

64J209

Stop the vehicle completely, place the

transmission in "N" (Neutral) and depress

the brake pedal and the clutch pedal fully

(if equipped), then push in and turn the

switch to the mark (1) at the left of the "N"
position, and hold the switch in this posi-

tion for 5 seconds until the "N" indicator

blinks, then turn the switch to the "N" position.

When you turn the transfer switch to the

"N" position, "N" indicator will come on with

the buzzer sound.

CAUTION

• Be sure to stop the vehicle completely

before operating the transfer

switch to shift between "N" and

"4H", or between "4H LOCK" and

"4L LOCK".

• Do not shift between "4H" and "4H

LOCK" unless the front wheels are

in the straight-ahead position and

we recommend that the vehicle

speed be less than 100 km/h (60

mph).

Do not operate the transfer switch

while tires are racing.

• Do not operate your vehicle in "4H

LOCK" or "4L LOCK" on dry, hard

surfaces.

(Continued)

CAUTION

(Continued)

• Do not operate the vehicle while a

4WD mode indicator is blinking

except when shifting between "4H"

and "4L LOCK".

If you operate the vehicle while a

4WD mode indicator is blinking, a

buzzer will sound and the transfer

will shift to "N" (Neutral) to prevent

transfer case damage.

In this case, use the following procedure.

1) Depress the clutch pedal fully (if

equipped) or shift the automatic

transmission gearshift lever to the

"N" position.

2) Turn the transfer switch to the

position previously selected.
3) Operate the transfer switch again.

Feb 01, 2011 | 2007 Suzuki Grand Vitara 4WD

1 Answer

2005 f150 lariat will not go into 4wd. no light, no engage, nothing? I tried shifting, depressing brake, go to 4l, back to 4h, off, on, rev'ed motor. Absolutely unresponsive.


Is the system ESOF ( Electronic Shift On the Fly ) or MSOF ( Mechanical Shift On the Fly ) ?

Lift and support the front of the truck so the front wheels are off the ground ( take safety precautions, chock wheels, jack stands, etc )
Key on, engage 4x4 and try to turn the front drive shaft.
If it turns it is a problem with the transfer case.
If it doesn't it is a front axle engagement problem.

This section is specific to the New Body Style 2004 ( not the 2004 Heritage model ).
- If the front drive shaft does not turn :
Shut of the truck ( still jacked up, and supported ) remove the vac lines from the IWE. The spring should push the gears in, without the vac line on.
Check the vent line ( tube that is routed into the engine compartment with nothing attached to it ), for blockages.
If the vent line is clear, and with the vac lines off the IWE should be engaged ( both front wheels locked ).
If they lock, the problem is with the IWE solenoid not shutting off vacuum to the IWEs. There is a TSB on the 2004-2006 IWE solenoids, a newer revision has been made, and used from 2007 and newer MYs.

Here is a block diagram of the IWE system
sscullys_29.jpg

If you have an ESOF system and the front drive shaft turns, try tapping on the transfer case, while someone turns the switch to 4H and 4L with a dead blow hammer ( not a metal hammer ). Some times the shift motor will get hung up and not shift. This will cause the truck not to cut vacuum to the IWE solenoids, and not confirm the action with the light on the range select switch.
Also, check the fuses for the ESOF system, should be fuses F111, F11, F29, F30. In the fuse panel under the hood, there is the clock wise and counter clock wise relays, pull them and bench test with a meter and external 12 VDC power supply for correct operation ( these are what turn the shift motor clock wise and counter clock wise ).

Nov 22, 2010 | 2004 Ford F150

2 Answers

I have a Ford F150 that I engaged into 4L. Now I am trying to engage back to 2H and it is not engaging back. The 4x4 is controlled from the inside of the truck. The controller doesnt feel like there is any...


The switch could be bad, but if you cannot select 4H or 2H, I would think the shift motor in the transfer case is the issue.
This is assuming when you posted "control switch be bad", that you have an ESOF ( Electronic Shift on the Fly ) system.

Some times the Shift motor in the transfer case hangs up, and tapping the back of the transfer case cures the problem. The other thing could be the connector on the transfer case is corroded, remove the connector, and check it for water and other junk, clean if necessary.

You can remove the switch from the dash, and check the resistance on it.
35b14ff.jpg

If you secure the truck ( chock the wheels, parking brake, etc ) and having someone turn the ESOF switch from 4L to 2H or 4H, while tapping on the transfer case, this would be a good place to start.

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2 Answers

1998 f150 4x4 not working


Check BJB ( aka Battery Junction Box, Engine Compartment fuse panel ) Fuse #17. This is the power to the Transfer Case shift relay, which powers the Shift motor in the Transfer case and power to the magnetic clutch coil ( via the transfer case relay ).

The other fuse to check is the CJB ( aka Central Junction Box, cab fuse panel ) Fuse #23.

If both fuses check good, time to check for power on the connector for the shift relay and the shift motor. The power from BJB Fuse # 17 is the Dark Green w/ Light Green stripe ( this is hot at all times ).
The old school test is to lightly hit the back of the transfer case, to see if the shift motor is hung up.
Here are the diagrams, so you can see what I am talking about.
4068e7c.jpg
76ef260.jpg
1fec4e1.jpg

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